Sighting system for antiaircraft guns



April 16, 1929. s. e. GREEN: v 1,769,013

SIGHTING SYSTEM FOR ANTIAIRCRAFT GUNS Filed D60. 1926 2 Sheets-Sheet 1gww/ntoc Samuel E Green Apr-i116, 1929.

2 Sheets-Sheet I Filed Dec. '7, 192

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5. f v u 5 an m 5 I /6 wr VSL 6 .w a 3 2 e u 4 5 2 0 I m Q zjvwmtocSamuel E- Green Patented Apia 2.

' STATES SAMUEL G. GREEN, OF GRAY, GEORGIA.

. srerrrmo sYs'rEM FOR mmacRAr-r ermsn Application filedDecember 7,1926i Serial No. 153,188. 7 (GRANTED urns-arm: ACT or mmcn s, 1883, AS.mrmmn Aran. so, 19 2 are 0. s: 75%.)

The invention described herein may be manufacturedand used by or for theGovernment for governmental purposes without the payment to me of anyroyalty thereon.

' The subject of this invention is a sighting system for. anti-aircraftguns and relates more particularly to that type of sighting systemin-which an independent sight 1s provided for the elevation and azimuthoperator and vertical and lateral deflection corrections are-applied 'tothe sights by other members of the gun crew. In the employment of gunsor groups of guns of the rapid firing automatic type, it is consideredadvisable to employ open sights as distinguished from the closed ortelescopic sights and the principal objects of the present invention areto simplify the constructionof the sights, facilitate their oper- 2ationand enable them to be placed on the same side of the mount in sucha manner that the sight operators may track the target with accurac andrapidity. Withthe oregoing and other objects in view, my inventionresides in the novel arrangement and combination of parts and m thedetails of construction hereinafter described and claimed, it beingunderstood that changes in the precise embodiment of the inventionherein disclosed may be made within the scope of what is claimed withoutdeparting from the spirit of the invention. 1 A practical embodiment ofthe invention is illustrated in the accompanying drawmgs,

wherein:

Fig. 1 is a view in side elevation of a multiple gun mount equipped withmy lmproved sighting system;

Fig. 2 is a view in rear elevation thereof;

Fig. 3 is a detailed longitudinal sectlonal view through the elevationfront sight;

Fig. 4 is a. detail view of the vertical deflection scale;

Fig. 5 is a plan view of the actuatlng '45 mechanism of the azimuthsighting system;

Fig. 6 is a sectional view on the line 6-6 of Fig. 5- v Fig. 7 1s adetail view 1n elevation of one of the rear si hts;

Fig. 8 is a i ragmentary detail view of the firing mechanism.

Referring to the drawings by numerals of reference: 7

There is shown a gun'mount comprising a pedestal base 6 on which isrotatably mounted a top carriage 7 in which a cradle8 is trunmoned. Asherein shown the cradle is of sufficient width to support a group offour machme'guns 9 but the number of guns does not affect the operationof the sighting system.

Actuating mechanism 10 fortraversing the top carriage and mechanism 11for elevatmg the cradle are both positioned to the left of the mount toallow room for the gunner who controls the firing mechanism indicated at12 at the right ofthe cradle. The slghting system for pointing the gun1n azimuth is arranged convenient to the travers ng mechanism 10 .andaccordingly it 1s posltloned some distance below the cradle and at theextremity of a laterally extendmg bracket 13 fixed to the. top carriage.This sighting system is carried on a lateral swinging bar 14 pivoted at'15 to a vertically swinging carrier 16 which is pivoted at 17 to thebracket 13. Fixed to the bar 14 are c r the front sight including thevertical wire 18 and rear sight 19, the latter being placed, coaxialwith the pivot 15 of the bar so that as the bar is swung laterally thegun pointer will not be compelled to shift his position and as aconsequence he may track the target with great accuracy and rapidity.

A- houslng 20 situated between the carrier 16 and the bar 14 mounts aworm 21 which meshes with a worm wheel segment 22 fixed on the pivot 15.By means of this gearing the bar and sighting system carried, i

thereby is displaced from parallelism with the axis of boreangularamounts corresponding to lateral deflection corrections and thisdisplacement may beread in mils on a-scale 23 over which moves a pointer24 fixed to the bar. "95

The sight bar and carrier are maintained parallel to the cradle duringits movement' in elevation by means of a link 25 connecting the forwardportions of the carrier 14 v to the cradle.

The sighting system for pointing the gun in elevation is carried by the.cradle and consists of a rear si ht 26 mounted over the era 7 dietrunnion an a front sight 27 including 4 a horizontally disposed wire27. This .105 front sight is moved in a vertical plane with so"v ' 10vertical movement.

' 2 directly over the pivot of said respect to the cradle bein mountedon a lead screw 28 and is restraine against rotational movement by meansof a guide .post 29. The vertical displacement of the wire 27' on Iapplying the deflection correction may be 1 read against the scale 80 bymeans of a pointer 31 which is mounted on the lead screw and has itsindex portion engaged in the recess 32 of the scale to constrain it to Iso arate sightin systems for azimuth and e Vation', .the ormercomprising a laterally I swinging bar, pivoted on the carrier, a frontsight consistin of a vertically disposed wire at one end of t e bar, arear si ht positioned in, the elevation sighting stem comprising a rearsight "positioned on t e cradle trunnion and a front I sight on thecradle movable vertically with respect to the man a including a hon-izontally di wire..

2. In com ination with arallel comma supportin members, an e evation andazimuth si ting system respectively carried thereby and each including afront si ht and a rear sight, the azimuth system isplaceable, about theaxis of its rear sight horizontally with respect to its supportm member,the elevation system displaoeab e vertically with respect to item rtingmember and means for displ Y e front sights to apply deflectioncorrections 3; The combination with a gun mount and a cradle trunnionedthereon, of a sight carrier pivoted at one end on the mount, a linkconnecting the other end of the earner to the cradle for maintaining thecarrier and cradle in relationship at all angles of elevation, a sightbar pivotally mounted on the carrier for lateral displacement, means fordisplacing the'bar to apply deflection corrections, a rearsightposltioned on the bar oo-axial with its axis of lateraldisplacement and a front sight tically disposed wire carried at the ofthe bar.

a verend SAMUEL column.

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